9-3 Viggen Convertible (9400) L4-2.3L Turbo (B235) HO (2001)
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Alarm Horn: Description and Operation
Siren
General
The acoustic alarm of the anti-theft system includes a siren (piezo-electric type) with battery back-up. It is located at the rear edge of the LH front wheel
housing.
Function
The siren is powered with +30 from fuse 35 (22a) and grounded at grounding point G35. TWICE communicates with the siren via pin 29. TWICE
arms/disarms the siren and also controls the sound pattern when the alarm is tripped.
